Fix logic: preserve dots in format extension for nii.gz lookup

aman0311x · aman0311x · commit 3d3b0cc5588a · 2025-12-30T00:03:09.000+06:00
Signed-off-by: Mohammad Amanour Rahman &lt;amanourrahman@gmail.com&gt;
diff --git a/monai/data/image_writer.py b/monai/data/image_writer.py
@@ -127,7 +127,7 @@ def resolve_writer(ext_name, error_if_not_found=True) -> Sequence:
             "tiff": "Pillow or tifffile",
         }
 
-        fmt_clean = fmt.replace(".", "").lower()
+        fmt_clean = fmt.lower()
         package_hint = recommended_packages.get(fmt_clean, "")
 
         msg = f"No ImageWriter backend found for {fmt}."

Original file line number	Diff line number	Diff line change
`@@ -127,7 +127,7 @@ def resolve_writer(ext_name, error_if_not_found=True) -> Sequence:`
`127`	`127`	`"tiff": "Pillow or tifffile",`
`128`	`128`	`}`
`129`	`129`
`130`		`- fmt_clean = fmt.replace(".", "").lower()`
	`130`	`+ fmt_clean = fmt.lower()`
`131`	`131`	`package_hint = recommended_packages.get(fmt_clean, "")`
`132`	`132`
`133`	`133`	`msg = f"No ImageWriter backend found for {fmt}."`